Well i bought a $200.00 lq4 out of a 2003 2500hd, with 10k miles. Only thing was, the truck burned to the ground around the engine. The valve covers got hot and melted, and the intake completely melted until there were only a few small bits of melted plastic in the intake ports.

The fire department did one hell of a job hosing this thing down, luckily, it had stopped running by then. Brought it home, started tearing it down. here are some pics

heres the original pic i saw on craigslist

here is one bank after i pulled the head

here is the other after pulling the head